FILE - In this Sept. 28, 2018, file photo, House Judiciary Committee ranking member Jerry Nadler, D-N.Y., talks to media during a Senate Judiciary Committee hearing on Capitol Hill in Washington. Nadler, the top Democrat on the House Judiciary Committee says he believes it would be an "impeachable offense" if it's proven that President Donald Trump directed illegal hush-money payments to women during the 2016 campaign. But Nadler, who’s expected to chair the panel in January, says it remains to be seen whether that crime alone would justify Congress launching impeachment proceedings. (AP Photo/Carolyn Kaster, File)

FILE - In this Aug. 9, 2017, file photo, State Department spokeswoman Heather Nauert speaks during a briefing at the State Department in Washington. President Donald Trump is expected to nominate Nauert to be the next U.S. ambassador to the United Nations. Two administration officials confirmed Trump’s plans. A Republican congressional aide said the president was expected to announce his decision by tweet on Friday morning, Dec. 7, 2018. The officials were not authorized to speak publicly. (AP Photo/Alex Brandon, File)

Former FBI Director James Comey is followed by reporters on Capitol Hill in Washington, Friday, Dec. 7, 2018, following his appearance before a closed-door hearing with the House Judiciary and House Oversight committees. (AP Photo/Susan Walsh)

FILE - In this Oct. 19, 2018, file photo, Democratic challenger Tony Evers, left, and Wisconsin Gov. Scott Walker, a Republican, shake hands during gubernatorial debate in Madison, Wis. Republicans pushing to hang on to power in Wisconsin and Michigan aren't stopping at curbing the authority of incoming Democratic governors. They're also trying to hamstring Democrats who are about to take over as attorneys general. (Steve Apps/Wisconsin State Journal via AP, File)

FILE - In this Nov. 7, 2018, file photo, Mark Harris speaks to the media during a news conference in Matthews, N.C. The nation's last unresolved fall congressional race with Harris against Democrat Dan McCready is awash in doubt as North Carolina election investigators concentrate on a rural county where absentee-ballot fraud allegations are so flagrant they've put the Election Day result into question. (AP Photo/Chuck Burton, File)

Senate Minority Leader Chuck Schumer, D-N.Y., leaves a closed-door security briefing by CIA Director Gina Haspel on the slaying of Saudi journalist Jamal Khashoggi and the involvement of the Saudi crown prince, Mohammed bin Salman, at the Capitol in Washington, Tuesday, Dec. 4, 2018. (AP Photo/J. Scott Applewhite)

Former FBI Director James Comey, with his attorney, David Kelley, left, arrive to testify under subpoena behind closed doors before the House Judiciary and Oversight Committee on Capitol Hill in Washington, Friday, Dec. 7, 2018. (AP Photo/J. Scott Applewhite)

German Chancellor and chairwoman of the German Christian Democratic Union (CDU), Angela Merkel, waves after her farewell speech during a party convention of the CDU in Hamburg, Germany, Friday, Dec. 7, 2018. 1001 delegates are electing a successor of German Chancellor Angela Merkel who doesn't run for party chairmanship after more than 18 years at the helm of the party. (AP Photo/Michael Sohn)

House Democratic Leader Nancy Pelosi of California, meets with reporters at her weekly news conference on Capitol Hill in Washington, Thursday, Dec. 6, 2018. (AP Photo/J. Scott Applewhite)